Hi Alan On Wed, Jul 22, 2015 at 9:16 AM, Robson, Alan <alan.rob...@viasat.com> wrote: > > I’d like a single query to return all the freezes for a system specified > by its fqdn in one shot (ie. if possible not have to query to collect the > resources with that fqdn (eg sys:Pug-2) followed by a separate query to get > the freezes that are rdf:about sys:Pug-2) >
First of all LDPath is a resource-centered query language: you start with a context resource and then you follow paths. For such kind of queries " return all the freezes for a system" maybe SPARQL would give your better expressiveness. Check it out in Marmotta, please. > I have two questions… > > 1) How can I select cal:dtstart and cal:dtend times for freezes > belonging to the freeze matching rdf:about[crtv:fqdn is "pug.local"] ? I > can see how I can select rdf:about, but not the other fields in the freeze > record > Because at that point you already walked the path, you're already in the rdf:about, and you can' t go back to the parent. Jakob, do we have any trick for such construction? 2) How can I group the results together ? If I mess with it I can get > a list of start times, a list of end times or even a big list of start and > end times mixed together, but I can’t figure a way to get a list of pairs > of start and end times that go together, one for each “Freeze”. Maybe I > have just structured the data wrongly. > I guess this is something easier to query with SPARQL... I'd recomend you to take a look to the language specification: http://marmotta.apache.org/ldpath/language Sorry for not being so helpful. If Jakob jumps in he could probably help you more, since he is the expert on LDPath. Cheers, -- Sergio Fernández Partner Technology Manager Redlink GmbH m: +43 6602747925 e: sergio.fernan...@redlink.co w: http://redlink.co
